NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE 1 33 



perhaps the most amazing is that of Alcyonidium disciforme Smitt 

 which has the shape of a convex washer. The largest colony meas- 

 ured 50 mm. in diameter, with the rim measuring 12 mm. in width, 

 leaving the hole in the "washer" about 26 mm. in diameter. A colony 

 39 mm. in diameter had a rim 14 mm. wide. As the colony increases 

 in size, the diameter of the hole in the center also becomes larger. 

 This species was taken from muddy bottom from 10 to 80 feet. A 

 few specimens came from Eluitkak Pass and one from 328 feet. Since 

 the colonies are unattached, they are frequently washed ashore. They 

 often have the firm gelatinous egg masses of some snail attached to 

 them. This species was known previously only from the Kara Sea, 

 and Wakeham Bay, Ungava. 



The club-shaped Alcyonidium pedunculatum Robertson forms firm 

 jelly-like colonies sometimes more than 100 mm. long and up to 15 

 mm. in diameter at the widest point. The cuticle is translucent brown 

 and the zooids are a darker brown. Colonies came from Eluitkak Pass 

 and from no to 162 feet, the latter through the ice on February 18, 

 1950, and were washed ashore during storms. This is the first record 

 of this species since it was described from the Pribilof Islands in 1902. 



Even more unusual than the above species was the new Alcyonidium 

 enteromorpha Soule, which was collected on August 17, 1949, at 

 741 feet and on September 6, 1949, at 477 feet. It forms long, 

 roughly cylindrical, gelatinous, unbranched, pale amber colonies with- 

 out peduncles (in contrast to the above species). In both hauls these 

 colonies of enteromorpha were so entangled with the tubes of the 

 annelid Pista macidata, which made up the bulk of the haul, that it 

 was impossible to remove one intact. Lengths up to 750 mm. were 

 disentangled. 



Flustrella corniculata (Smitt), which forms branching, fleshy colo- 

 nies that are often covered with sand and debris, was common to 

 abundant in hauls from no to 477 feet, the greatest number of colo- 

 nies coming from 217, 328, and 453 feet. It is new to the western 

 Arctic. The related F. gigantea Silen, new to the Arctic, was also 

 taken at 217 feet. 



Bowerbankia gracilis aggregata O'Donoghue, also new to the 

 Arctic, was taken at Point Barrow. 



Phylum ENTOPROCTA 



Two species of this group were taken at Point Barrow. Both of 

 these species had been known previously "only from Kluge's record 

 (Drifting Ice Expedition in the central Arctic Ocean in the ice- 

 breaking Str. 'G. Sedov,' 1937-40)" (Osburn, 1953). 



